BT QUESTIONS(PREVIUOS YEARS)

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Two persons A nad B, each carrying a source of sound of frequency 600 Hz are standing a few meters apart in a quiet field. The beat frequency heard when A moves towards B with a velocity of 3 ms^-1 ( velocity if sound is 340 ms^-1) is

A) 1800337 Hz by A B) 1800340 Hz by A C) 1800340 Hz by B D) 600337 Hz by B

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Anirudh Kumar ·2010-02-28 22:06:59

f=f1-f2
= 600( 340/340-3)-600 applying Doppler for the source.
= 600(3/337)
= 1800/337 Hz

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BT QUESTIONS(PREVIUOS YEARS)

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